linux-kernel - Re: [PATCH 09/15] iommu/arm-smmu-v3: Use accessor functions for iommu private data

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Message-ID: <20200316154948.GJ304669@myrica>
Date:   Mon, 16 Mar 2020 16:49:48 +0100
From:   Jean-Philippe Brucker <jean-philippe@...aro.org>
To:     Joerg Roedel <joro@...tes.org>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        virtualization@...ts.linux-foundation.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Hanjun Guo <guohanjun@...wei.com>,
        Sudeep Holla <sudeep.holla@....com>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH 09/15] iommu/arm-smmu-v3: Use accessor functions for
 iommu private data

On Tue, Mar 10, 2020 at 10:12:23AM +0100, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@...e.de>
> 
> Make use of dev_iommu_priv_set/get() functions in the code.
> 
> Tested-by: Hanjun Guo <guohanjun@...wei.com>
> Signed-off-by: Joerg Roedel <jroedel@...e.de>

Reviewed-by: Jean-Philippe Brucker <jean-philippe@...aro.org>

> ---
>  drivers/iommu/arm-smmu-v3.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
> index aa3ac2a03807..2b68498dfb66 100644
> --- a/drivers/iommu/arm-smmu-v3.c
> +++ b/drivers/iommu/arm-smmu-v3.c
> @@ -2659,7 +2659,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
>  	if (!fwspec)
>  		return -ENOENT;
>  
> -	master = fwspec->iommu_priv;
> +	master = dev_iommu_priv_get(dev);
>  	smmu = master->smmu;
>  
>  	arm_smmu_detach_dev(master);
> @@ -2795,7 +2795,7 @@ static int arm_smmu_add_device(struct device *dev)
>  	if (!fwspec || fwspec->ops != &arm_smmu_ops)
>  		return -ENODEV;
>  
> -	if (WARN_ON_ONCE(fwspec->iommu_priv))
> +	if (WARN_ON_ONCE(dev_iommu_priv_get(dev)))
>  		return -EBUSY;
>  
>  	smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode);
> @@ -2810,7 +2810,7 @@ static int arm_smmu_add_device(struct device *dev)
>  	master->smmu = smmu;
>  	master->sids = fwspec->ids;
>  	master->num_sids = fwspec->num_ids;
> -	fwspec->iommu_priv = master;
> +	dev_iommu_priv_set(dev, master);
>  
>  	/* Check the SIDs are in range of the SMMU and our stream table */
>  	for (i = 0; i < master->num_sids; i++) {
> @@ -2852,7 +2852,7 @@ static int arm_smmu_add_device(struct device *dev)
>  	iommu_device_unlink(&smmu->iommu, dev);
>  err_free_master:
>  	kfree(master);
> -	fwspec->iommu_priv = NULL;
> +	dev_iommu_priv_set(dev, NULL);
>  	return ret;
>  }
>  
> @@ -2865,7 +2865,7 @@ static void arm_smmu_remove_device(struct device *dev)
>  	if (!fwspec || fwspec->ops != &arm_smmu_ops)
>  		return;
>  
> -	master = fwspec->iommu_priv;
> +	master = dev_iommu_priv_get(dev);
>  	smmu = master->smmu;
>  	arm_smmu_detach_dev(master);
>  	iommu_group_remove_device(dev);
> -- 
> 2.17.1
>